Many new Xiaomi smartphone owners face the first hurdle immediately after unpacking the device: how to physically access the SIM card slot. The Redmi 9 model is a combined tray manufacturer that requires careful handling and understanding of the body design. Incorrect extraction can damage the mechanism or even depressurize the case, which is critical for modern gadgets.
In this article, we will discuss in detail the process of extracting the tray, determine the location of the staples in the kit and discuss the nuances of installing microSD cards. It is important to follow the sequence of actions so as not to damage the contacts or the tray itself, which Xiaomi often makes of thin metal.
Preparation of the workplace and search for paper clips
Before you start mechanically affecting the body of the smartphone, you need to organize a safe workspace. Removing the tray requires a hard surface so that the phone does not slip out of your hands at the most critical moment. It is best to use a table with good lighting, covered with soft cloth or a mouse mat.
The Redmi 9 always comes with a special metal clip to remove the tray, which is usually in a small cardboard box along with a warranty card and user manual.Some users confuse it with a plastic stub or throw it away with the packaging, so it is worth paying attention when unpacking.
If the original paper clip is lost, you can use a paper clip, but this is not recommended. The metal of the stationery clips is often too soft and can bend inside the hole, getting stuck there forever. Sharp objects such as needles or pins are also dangerous, as they can damage the tray extraction detector.
⚠️ Warning: Never use knives, stitches or other sharp metal objects to remove the tray.You may damage the internal machinery or scratch the device body.
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If the paper clip is lost, it is better to buy a special tool for the SIM-Cards in the electronics store, than risk the integrity of the smartphone.
Location of the tray and extraction technique
The Xiaomi Redmi 9 has a SIM card tray on the top end of the case, standard for many of the brand’s smartphones, which allows for easy card extraction even if it’s not completely covered by a protective case. On the left side (when you look at the screen), there’s only the on button and the IR port, so don’t confuse them.
On the end, you'll see a small circular hole next to the oblong slot, and that's where you put a paper clip, and the direction of the force should be strictly perpendicular to the face of the phone, and the pressure should be certain, but not fanatical: the mechanism is designed to be specific to the force to trigger the spring.
Once you press the paperclip into the hole, the tray should extend a few millimeters, it can be easily grasped with your fingers and removed completely. If the tray is not extended, do not press harder — check if you hit the hole correctly and hold the tool perpendicularly.
☑️ Finding a hole SIM
Tray configuration and card installation
The tray in Redmi 9 is a combined design, which is an important technical nuance. It consists of two parts: one for a nano-SIM card and a second that can accept either a second nano-SIM or a microSD memory card. This means that you can't use two SIM cards and a memory card at the same time.
When installing cards, it is important to observe orientation. The tray itself often has a schematic image showing which side the card should lie on, the contact cards should be directed downwards (to the phone screen when installed), and the cut angle should match the shape of the tray. MicroSD cards are installed in a special slot on the back of the tray or in a separate compartment, depending on the revision of the board.
Once the cards are installed, the tray is gently inserted back into the phone until the characteristic click. You don't have to use excessive force: if the tray does not enter easily, it is skewed or the cards are installed incorrectly. The tightness of the case depends on the tight fit of the tray, so make sure that it is flush with the body.
| Type of card | Size | Location of contacts | Maximum volume |
|---|---|---|---|
| SIM-map | Nano-SIM | Down (to the screen) | Standard |
| Second SIM | Nano-SIM | Down (to the screen) | Standard |
| Memory map | microSD | Down (to the screen) | up to 512Gb |
| Tray | Combined | Metallic | 2 SIM or 1 SIM + microSD |
Software definition and network configuration
After physical installation of cards and switching on the smartphone system MIUI It will automatically detect new modules, and the detection notification will appear on the screen. SIM-If this does not happen, it is possible that the maps are incorrectly installed or the contacts are contaminated, in which case the extraction and installation procedure will have to be repeated.
To set up the Internet and transfer data, you need to go to the settings menu. The path usually looks like this: Settings → SIM-Maps and mobile networks. You can choose the default card for calls and mobile Internet (APN) They are usually automatically set up, but can be manually entered if necessary.
If you use a memory card, the system will suggest formatting it for use. Remember that formatting will delete all data, so it is better to format the card on your computer before installing it or back up immediately. The file system should be compatible with Android (usually exFAT or FAT32).
⚠️ Note: Do not remove the memory card or SIM-card while the phone is on, without first turning off the settings, this can lead to data loss or software failure.
Possible problems and solutions
One of the most common problems is when the phone is writing"SIM-This can be caused by oxidation of contacts on the card itself or in the slot. Wipe the SIM contacts with a soft eraser or an alcohol wipe. Also check if the metal tray itself is deformed.
If the tray is stuck and not being pulled out, don't try to pull it out with your nails or tweezers with force. Try tapping your phone slightly with your rib on your palm, holding the clip in the hole to create a vibration. Sometimes, light swaying the paperclip from side to side helps, but you need to do it very carefully.
In rare cases, the problem is software, and rebooting the device often solves the problem of map detection, and if nothing helps, the reader may have failed. SIM-Cards that require contacting the service center.
What to do if a paper clip breaks inside the hole?
Care for the slot and prevention of breakdowns
Slot for SIM-The cards are one of the few mechanical elements that are subject to wear, and the dust and moisture can get in through the clip hole. Check the cleanness of the end of the phone regularly. When used in dusty conditions, you can gently blow the hole with compressed air.
Moisture is the main enemy of electronics.While the Redmi 9 has some spray protection, diving in water or using in heavy rain through an open tray can lead to short circuit.Always tightly close the tray before the click to ensure maximum tightness.
When replacing cards, try to minimize the number of retrieval cycles. If you often need to change memory cards, consider using cloud storage or Wi-Fi data to save the life of the mechanical slot.
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Regular check of the density of the tray and the purity of contacts is the key to stable mobile communication and long service slot.